Door.



PATENTED JUNE 30, 1908.

F. SCOTT.

DOOR.

APPLICATION FILED mlmspleoa,

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No. 892,317. PATENTED JUNE 30, 1908. F. SCOTT. DOOR.

APPLIOATION FILED MAR. 18, 1908. r

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496% athnnuf UNITED STATES PATENT OFFICE.

FRANK SCOTT, OF ORBISONIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO JAMES B.

SHIVELY, OF SHIPPENSBURG, PENNSYLVANIA.

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I No. 892,317.

T 0 all whom it may concern:

Be it knownthat I, FRANK Soon, a citizen of the United States of America, residing at Orbisonia, in the county of Huntingdon and State of Pennsylvania, have invented new and useful Improvements in Doors, of which the following is a specification.

This invention relates to automatically operated doors designed for use in hotels, stores and other large buildings where many persons are constantly passing in and out, and one of the principal'objects of the invention is to rovide sim 1e and efficient means whereby t e doors wi fold automatically at the sides of the door frame whenever a per son steps upon the platform or approaches to said door.

Another object is to provide reliable and efiicient means for automatically opening the door and holding the same 0 en until the person or persons have passer through the oor opening, means being provided for automatically closing the door after the person or ersons have stepped off the platform.

hese and other objects may be attained by means of the construction illustrated in the accompanying drawings in which,

Figure 1 is a front elevation and artial section of an automatically operatec door made in accordance with my invention, the doors bein' shown closed. Fig. 2 is a horizontal section of the doors showing the platform in plan. Fig. 3 is a vertical section of the door frame, the platform and the operative mechanism. Flg. 4 is a transverse vertical section taken at right angles to Fig. 3 through the platform and floor, parts being broken away to better illustrate the construction.

Referring to the drawings for a more specific description of my invention the numeral 1 desi nates the door frame, and 2 is the floor provi ed with a transverse slot 3. The door comprises four sections, the two central sections 4 being connected by hinges 5 to the outer sections 6, said outer sections being hinged at 7 to the door frame 1. The cross piece 8 at the to of the doors is rovided with a metal guic eway 9, and the oor sections 4 near their meeting edges are provided with rollers 10 which move in the guideway 9.

A platform 11 provided with a transverse slot 12 is supported immediately above the floor 2 upon yielding devices comprising a tubular member 13 connected to the plat- Specification of Letters Patent.

Application filed March 18, 1908.

Patented June 30, 1908.

Serial No. 421,771.

form 11 by means of a screw 14 and diagonal braces 15, said braces being secured to the tube 13 at one end and extending through openings 16 in the floor 2 and connected by screws 17 to the platform, as shown more particularly in Fig. 4. Sliding bolts 18, each provided with a collar or enlargement 19, are mounted to slide in each tube 13, and a spiral spring 20 surrounds each bolt 18 and bears at its upper end against the tube 13, while its lower end bears against the collar 19. The projecting lower end 21 of the bolt is supported upon a beam 22 formingpart of the 'oormg.

Journaled under the floor 2 in suitable brackets 23 is a roller 24, said roller having oppositely disposed spiral grooves 25, said grooves starting from a central point in the roller and extending to the outer ends of said roller in oppositely spiral directions. Connected to the lower edges of the door sections 4 near their meeting edges are bolts 26, said bolts extending through the slot 12 in the platform 11 and through the slot 3 in the floor, said bolts having upon their lower ends rollers 27 which travel in the grooves 25 of the roller 24.

Secured to one of the braces 15 is an arm 28, and pivoted to the outer end of said arm is a lever 29 pivoted at 30 to a bracket 31, said lever having a fork end provided with slots 33, and extending through said slots are headed pins connected to the hub of a clutch 35, said clutch member having a grooved pulley 36 thereon for a belt 37 designed to engage a shaft to be operated by any suitable source of power. The clutch member 35 is adapted to engage the clutch member 35 carried by the end of the shaft of the roller 24. At the ends of the roller 24 annular grooves 38 are provided and at the terminal ends of the grooves 25 springs 39 are secured, said springs spanning the grooves 38, as shown more particularly in Fig. 1. The roller 24 has connected thereto at one end a drum 40, and a rope 41 is connected to said drum, wound around the same and supports a weight 42.

The operation of my invention may be briefly described as follows: Supposing the doors to be closed, as shown in Fig. 1, a person stepping upon the platform 11 at either side of the door would depress the tubes 13' against the tension of the springs 20 until the platform 11 rests upon the top of the floor 2.

This movement of the platform operates the arm 28 and the lever 29 to engage the two members 35 and 35 of the clutch. The belt 27 moves in the direction indicated by the arrow in Fig. 1, thus rotating the roller 24 and moving the door sections 4 outward by means of the rollers 27 which engage the grooves 25 in said roller. Then the rollers 27 arrive at the annular grooves 38 at the ends of the roller 24, the doors are held open until the person steps off the platform 11. At this time the weight 42 reverses the rotation of the roller 24 after the clutch members 35 and 35 have been separated. The rollers 27 are then brought against the springs 39 and directed into the grooves 25, and the door is then closed, as will be understood.

From the foregoing it will be obvious that a door made in accordance with my invention will be automatically opened and closed from either side that the device is of com paratively simple construction, can be quickly installed and will operate smoothly and efliciently under varying conditions.

Many changes in the details of construction may be resorted to without departing from the spirit and scope of the invention as defined in the appended claims.

Having thus described the invention, what is claimed as new, is

1. An automatically operated door, comprising door sections hinged together, a roller provided with oppositely disposed spiral grooves, bolts connected to the doors and provided with rollers disposed in said grooves, a spring mounted platform, a rotating element, a clutch adapted to connect said roller thereto, and means connected to said platform for operating said clutch.

2. Automatically operating doors comprising door sections hinged together, a guide at the upper side of said doors, rollers connected to said doors to move in said guide, a roller provided with oppositely disposed spiral grooves, bolts connected to the doors and provided with rollers engaging said grooves, a platform, a rotating e ement, a

clutch adapted to connect said roller thereto, means connected to said platform for operating said clutch to fold the doors, and means for closing said doors.

' 3. Automatically operating doors comprising door sections hinged together and hinged to the door frame, a roller provided with oppositely disposed spiral grooves, bolts connecting said doors and grooves and provided with rollers to move in said spiral grooves, a platform, spring supports for said platform, means connected to said platform for operating a clutch to connect said roller to a rotating element, means for rotating said roller in one direction, and a drum and weight for rotating said roller in the opposite direction to close the doors.

4. In a device of the character described, door sections hinged together, a roller provided with oppositely disposed spiral grooves, bolts connected to said door sections and provided with anti-friction rollers mounted in said spiral grooves, a rotating element, a platform, a spring support for said. platform, means connected to said platform for throwing into operation a clutch for connecting said roller to said element to open the doors, and means for closing the doors.

5. In a device of the character described, door sections hinged together, a spirally grooved roller, bolts secured to the central door sections and provided with rollers to engage the spiral grooves in the roller, annular grooves at the ends of said roller, springs for spanning said grooves, a platform, a clutch, connections between said platform and clutch, a rotating element forming part of said clutch for rotating said roller in one direction to open doors, and gravity means connected to said roller for closing said doors.

In testimony whereof I affiX my signature in presence of two witnesses.

FRANK SCOTT.

Witnesses:

JOHN L. FLETCHER, E. P. BUNYEA. 

